The 4th Arecibo Survey (ar4) published its results in papers published from 1990 to 2019 with a total of 94 new pulsars discovered.
It detected a total of 141 pulsars.
The fastest pulsar discovered was J2229+2643 with a period of 2.97782 milliseconds and the slowest pulsar was J1746+2245 with a period of 3.46504 seconds.
The smallest pulsar dispersion measure was J1503+2111 with a DM of 3.2603 pc/cc and the largest pulsar dispersion measure was J1859+00 with a DM of 423.0 pc/cc. There were a total of 452 pulsars known before the first discovery was published. This survey increased the total amount of known pulsars by 21.0%.